/*
 *	TypeWatch 2.0 - Original by Denny Ferrassoli / Refactored by Charles Christolini
 *
 *	Examples/Docs: www.dennydotnet.com
 *	
 *  Copyright(c) 2007 Denny Ferrassoli - DennyDotNet.com
 *  Coprright(c) 2008 Charles Christolini - BinaryPie.com
 *  
 *  Dual licensed under the MIT and GPL licenses:
 *  http://www.opensource.org/licenses/mit-license.php
 *  http://www.gnu.org/licenses/gpl.html
 */

(function(jQuery) {
    jQuery.fn.typeWatch = function(o) {
        // Options
        var options = jQuery.extend({
            wait : 750,
            callback : function() {
            },
            highlight : true,
            captureLength : 2
        }, o);

        function checkElement(timer, override) {
            var elTxt = jQuery(timer.el).val();

            // Fire if text > options.captureLength AND text != saved txt OR if override AND text > options.captureLength
            if ((elTxt.length > options.captureLength && elTxt.toUpperCase() != timer.text)
                    || (override && elTxt.length > options.captureLength)) {
                timer.text = elTxt.toUpperCase();
                timer.cb(elTxt);
            }
        }

        ;

        function watchElement(elem) {
            // Must be text or textarea
            if (elem.type.toUpperCase() == "TEXT" || elem.nodeName.toUpperCase() == "TEXTAREA") {

                // Allocate timer element
                var timer = {
                    timer : null,
                    text : jQuery(elem).val().toUpperCase(),
                    cb : options.callback,
                    el : elem,
                    wait : options.wait
                };

                // Set focus action (highlight)
                if (options.highlight) {
                    jQuery(elem).focus(
                            function() {
                                this.select();
                            });
                }

                // Key watcher / clear and reset the timer
                var startWatch = function(evt) {
                    var timerWait = timer.wait;
                    var overrideBool = false;

                    if (evt.keyCode == 13 && this.type.toUpperCase() == "TEXT") {
                        timerWait = 1;
                        overrideBool = true;
                    }

                    var timerCallbackFx = function() {
                        checkElement(timer, overrideBool)
                    }

                    // Clear timer
                    clearTimeout(timer.timer);
                    timer.timer = setTimeout(timerCallbackFx, timerWait);

                };

                jQuery(elem).keydown(startWatch);
            }
        }

        ;

        // Watch Each Element
        return this.each(function(index) {
            watchElement(this);
        });

    };

})(jQuery);